DirectAccess DeviceKey: add support for default storage type

[offirko]

Description

DirectAccess DeviceKey added support for default storage type, which depends
on Component type.

Pull request type

[X] Fix
[ ] Refactor
[ ] Target update
[ ] Functionality change
[ ] Docs update
[ ] Test update
[ ] Breaking change

Reviewers

@ARMmbed/mbed-os-maintainers
@ARMmbed/mbed-os-storage

[offirko]

@ARMmbed/mbed-os-maintainers
@ARMmbed/mbed-os-storage
Please review

[offirko]

@ARMmbed/mbed-os-maintainers : travis doxy-spellcheck fails on

platform/mbed_rtc_time.h

Errors:
101:/** retarget
113:/** retarget
103: secondsa
115: secondsa

1. Is this a new feature?
2. Why does it fail on files not related to my delivery?
3. "retarget" seems to be a valid English word (-:
   (at least by https://www.merriam-webster.com/dictionary/retarget)

retarget verb
re·​tar·​get | \ (ˌ)rē-ˈtär-gət
retargeted; retargeting
Definition of retarget
transitive verb
: to direct (something) toward a different target

[ciarmcom]

@offirko, thank you for your changes.
@ARMmbed/mbed-os-storage @ARMmbed/mbed-os-maintainers please review.

[yossi2le]

LGTM

[0xc0170]

Travis fix is in the CI , will be in today and this just need simple rebase (will notify all PR affected , so far 2 are).

[cmonr]

NOTE: This PR has now been rebased.

If this was made in error, feel free to force-push your local branch to restore the PR.

[cmonr]

CI started

[mbed-ci]

Test run: SUCCESS

Summary: 11 of 11 test jobs passed
Build number : 1
Build artifacts

[0xc0170]

Labeled for 5.11.3 (test update) , it was for 5.12

[cmonr]

@0xc0170 It was marked for 5.12 because of this code addition: https://github.com/ARMmbed/mbed-os/pull/9407/files#diff-c1dac274989206951b3257f29e300a1c

@adbridge @NirSonnenschein Thoughts?

[0xc0170]

@0xc0170 It was marked for 5.12 because of this code addition: https://github.com/ARMmbed/mbed-os/pull/9407/files#diff-c1dac274989206951b3257f29e300a1c

@ARMmbed/mbed-os-storage what is this fixing and what version is this targeting?

[dannybenor]

We agreed with PDMC that they will take the code to their repo in the meantime. Will use this code from mbed OS in the next version of the bootloader. Can be delayed to 5.12